The moral arguments section
examines some of the common reasons given why abortion should be legal.
Many of these arguments involve dubious "benefits" from abortion
often using unquoted or exaggerated statistics. The primary question to be
answered is "Is the fetus a person?" or "When does human
personhood begin?" If the fetus is a person or becomes a person at
some point in gestation, then it is automatically afforded rights under
the United States Constitution, including the right to life.

http://godandscience.org/abortion/sld023.html
Last Modified June 14, 2008